On 1/5/18 7:51 PM, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > Create the foundations of a filesystem scrubbing tool that asks the > kernel to inspect all metadata in the filesystem and (ultimately) to > repair anything that's broken. Also create the man page for the > utility. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> ... > +/* > + * XFS Online Metadata Scrub (and Repair) > + * > + * The XFS scrubber uses custom XFS ioctls to probe more deeply into the > + * internals of the filesystem. It takes advantage of scrubbing ioctls > + * to check all the records stored in a metadata object and to > + * cross-reference those records against the other filesystem metadata. > + * > + * After the program gathers command line arguments to figure out > + * exactly what the user wants the program is going to do, scrub * exactly what the user wants the program to do or - * exactly what the program is going to do or - * exactly what the user wants to do :) > + * execution is split up into several separate phases: > + * > + * The "find geometry" phase queries XFS for the filesystem geometry. > + * The block devices for the data, realtime, and log devices are opened. > + * Kernel ioctls are test-queried to see if they actually work (the scrub > + * ioctl in particular), and any other filesystem-specific information > + * is gathered. > + * > + * In the "check internal metadata" phase, we call the metadata scrub > + * ioctl to check the filesystem's internal per-AG btrees. This > + * includes the AG superblock, AGF, AGFL, and AGI headers, freespace > + * btrees, the regular and free inode btrees, the reverse mapping > + * btrees, and the reference counting btrees. If the realtime device is > + * enabled, the realtime bitmap and reverse mapping btrees are enabled. checked? -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
